''' was a designer and engineer of rollercoasters.
'''William Cobb''' may also refer to:
* William J. Cobb, best known as Happy Humphrey
, the heaviest professional wrestler of all time
* William T. Cobb
(1857–1937), Governor of Maine, 1905–1909
* William Jelani Cobb
(born 1967), American author and educator
* William Montague Cobb
(1906–1990), physical anthropologist
* William Cobb (Eureka character)
, a character on the American science fiction drama ''Eureka''
* Will D. Cobb
(1876–1930), American lyricist and composer
* Billy Cobb
(born 1940), English former footballer active in the 1960s